Controlling valve



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LEWS DARLING, OF PHILADELPHVEA',

rs* PAT-en ortie PENNSYLVANIA, assrenonv` To ELECTRIC f Mhle? SERVICE SUPPLIES COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- CONTROLLING vnLvE.-`

. p tion,reference being had to the accompany- "ino drawings.

My invention relates to controlling valvesg especially adapted for motor devices such as' steam turbine generators, .and to the actuaktion of such valves. is my aim to malte theprpvalve' structure and mechanismsiinple and easy to assemble, talle apart, or adjust; free from derangement in service; and easy and economical to manufacture. How these and other advantages 'can be obtained in connection with myinvention will appear from the description hereinafter of the best em- K bodiment of Vthe invention at present known to me, while its'scopeand essentials will be indicated in-my claims.` rif'he invention is especially..desirable-forsteam turbo genera-y tors used for operating electric headlightso'f steam locomotives. 'f

In the drawings, Fig. Lis a view of the' valve and its actuating mechanism in elevation.y the enclosing structure being shown partly in section.V s'

Fig. ll,shows a cross-section of the valve proper atthe line ll-Il. in lt'ig. I. f Fig.l III, is aplanview of a valve actuati v ing or operating part.

` casing; 1, witha side pocket that communie.

- As hereshown, he turbine structure'hasa cates with the main turbine chamber con;-

taining the bucket wheel or rotor (not shown). In an opening in the upper-'portion of the casing 1, issecured a fixed structuralv system or group of parts that affords a mountingfor the valve` body 2,' and the associated operatingfparts. -This system includesa sleeve 3 with internal passagesl and 5, at different'longitudinal intervalsgor levels. and, inthis instance, .la cap 6, shown as separate from the sleeve 3; The passages 4, receive the steam from the supply pipef?,

:through a corresponding passage 8, in Athe casing 1, :and the passages 5" deliver/it to the turbine wheel through the correspond ing passage 9, in said casing1, and the .nozzles 10. The opening in which the sleeve 3, is .mounted includes or intersects: overlap-r A. DARLING, a

Application filed .Tune l18, 1919. ASerial Nn1305jl25.y

' ping portionsy ofthe vpassa-ges 8 Vand 9, and

also an additional'overlappingipassage 11'.7 that communicates with the turbine kwheel space or chamber. The internal bore ot the sleeve 3, opens into thisy passage 11, soA that" the corresponding endvof the valve body 12, is exposedV to the pressure therein.

The sleeve passages 4 and 5, it will be seen,

open intok deep grooves 152v and 13, in the inner wall ofthe sleeve'bore.' The. valve body '2, shown is in the form `of a solid, yonepiece piston'y valve, with a .reduced middle portion 'of suficient lengthvr vto overlap the grooves 12and'13', simultaneously and permitfthe steam to passjfreely therearound,

unthrottled, from the vpassages 4, tothe passages 5. The enlarged ends V`or heads of this eoy valve bodvQ, arevof 'the same width and have "packing and .lubricating grooves for taking" advantage of.tlie packing action et the water in -thesteainandinsuringgood lubrication of the adjacent relatively movablefsurfaces. Vrllhe valve has atv its ends similar actuating krodmnnbers 15iandr16, (here shown asjsubstantia'lly identical). projecting endwisefrom the heads, It is, there'- forpe, Y'reversible end forv end 'andisubstan-Iy f tiallyv. symmetrical; Its lower en d, it will be seen, is `frn'eelyrexposedV in a chamber 17,

stormed by enlargement of the sleeve bore;- and thecorresponding actuating rod- 16. enL

tends out. loosely through aV relt'itivelv large hole in-this end of the sleeve 2; so thatthe chamber.,` 'HenceY the valve body 2` is com# pletelyb'alanced, as well as reversible,..end for end', in respectv of all yits functions, since both'wits .piston heads 'and its actuating rods V are, respectively,substantially counterparts `of one another. g. A shoulder'` on the actuat# ing. rod prevents damage to the lower valve pistoni'f it should strike the bottom o theV chamber 17, forcibly.

The'uppery portion of the sleeve 8', it will be seen, has a-'tapered seating inthe casing 1, whileitsfjcylindricaljlower end is screw threaded into theycasing opening. The upp'erend of the sleeve is .diametrally slot-y ted at18, `for engagement of. a tool to screw it-homefsozthat'it shall vbe held firm and fixed, orto .removeit The Aproportions ot the parts yare suchthat when the upper edge' f chamber ,17, is fin* free communication witlif' Y the pocket .at 1,1and with'the' turbine. wheel", ,90.

@italia uppervalve head. is flush with the Y the cap 6, is unscrewed and removed, the spring 2l, and the abutment member 2O,`

upper surface of the sleeve 3the effective arca et' the annular opening at 13, at thev upper edge of the lower valve head is right lfor the correct quantity of fluid to pass througn at the correct pressure to be maintainedf'lor full load operation of the turbine, in accordance with the design ofthe nozzles l0. The upper cylindrical end of the valve casingV opening wherein the sleeve 3, is'

mounted is of sutlicientl sizeto permit removal ot the sleeve therethrough as well as of the valve 2, but is normally closed pres-- sure tight vby the cap 6, whichris screwlongitudinally or-,endwise (downward) in' the sleeve 3. K Since the valve 2 takes fiuid under pressure in the middle, the'hlgh tempcraiure liuid has no access to theY spring 2l.

As shown there is at the cap bottom a groove 22, undercut in the cap wall, and the uppermost convolution of the spring 21,'1s suitably enlarged `and shaped into` one plane,

`so as to engage .in said groove with some degree of radialk pressure and so secure the springin the cap. VThe abutment memberA Y20, interposed between `the spring 2l, and' the valve 2, has uptu-rned edge portion that is bent over inward (or even fpinched over)` so as to overhang the corresponding end convolution of the spring (which it surrounds) and secure'the .member 20, to the spring. Itwillbe seen, therefore', that when come with it, and the valve 2, can Vat once be reached and lifted out. and the valve 2 are,"therefore, freely removable through the opening above the mounting 8 immediately upon removal 'of the cap 6. The sleeve 3,- is also immediately acces` sible for unscrewing and removal. i

Into the pocket ll, extends' a shaft 25, having on the remote'end thereof an adjustably secured crank arm or level-26, adapted to be controlled bythe turbine governor through a connection 27, pivoted thereto at 28.' lVithin the pocket 1there ismounted on the shaftv 25, a cra/nk arm 30, having in its end subjacent to the valve rod 16, a screw abutment member 3l, for engaging the end ot said rod l6'fa`nd operating the valve 2 therethrough. As shown, provision for securing the 'abutment screw 31, in adjusted position is made by slitting the screw threadedn lever end that carries it and providing a screw S2, for clamping the walls of the` screw hole together on theabutment screw.r In order toset the valve 2, it isonly necessary to remove the cap 6, open the pocket `ment The spring 2l l, by removal of a cover (not shown) suit-Vv ably rsecured, to the 'liange 33, on the. easing,loosen the screw 32, and turn the abutcrew 3l, till the upper end of the upper valve head is flush with the'upper end surface of the sleeve 3, and then tighten the screw 32, and replace lthe parts. l

` lntoa hole in the lever 30, is hooked one 'end eta helical tension spring 34, -torreontrolling and adjusting the` action of the steam turbine speed governor,--which lmay be a ceiitri'tugal lyball `governor. The con-l volution at the other end of this spring is squeezed together and reduced in diameter so as to take under and engage the head of a screw 35, threaded into a boss 86, on the casing l, a jamb nut 37, being provided. nut 38, keyed to the screw .30, below the spring 3e, serves asa conveniently accessibl-e means tor turning the screw.- In .order to adjust the speed 0r voltage of the machine it is` only necessary to raise or lower the screw 35, till the proper value is 'obtained and `then tighten up the jamb nut 37.

-Having thus described l,my invention, I claim: l

l. ln a turbine having a side pocket communicating with the turbine chamber, the combination of a Controlling valve for motive fluid with an actuating member extending intofsaid pocket, said valve being reversible end `for endl and normally tending to move inward toward-'said pocket; and a `governor-controlled lever arm in saidpocket municating with the turbinechamber, the

combination of a balanced piston controlling valve taking fluid in the middle so as to nulliiy any effect of the fluid pressure to shift the valve in one direction or the other with fan actuating member extending into said pocket a spring acting on the opposite end of said valve from said actuating 'member to urge said valve toward said pocket; and a governor-controlled lever arm in said pocket for operating said valve through said actuating member.

A device in accordance with claim 2, in combination with an adjustment spring connected. to said arm and to the wall of said side pocket.

l. In a turbine having a side pocket communicating with theturbine chamber, the combination of a valve mounting structure yhaving an opening with a removable cap at ing'member extending into said pocket; va

governor-controlled memberin said pocket for operatingsaid valve through said actuating member; and a spring acting on the opposite end or said valve romrsaid actuatn ing member to urge said valve endivise in said mounting; said spring and said valve being :freely removable through said opening `n pon removal or" said cap. o v i 5. ln a turbine lia-ving aside pocket communicating with the tui-bine chamber, the combination of a balanced piston contr0l-' ling valve for motive iluid with an actuating member extending into said pocket; a spring acting on the opposite end of said valve from rsaid actuating member to `urge said valve toward said pocket; ar'governor-con- Ytrolled sliaft'extending through said pocket Y therein having a removable cap at one end lll thereof, and an opening at the other; a re-V movable, reversible7 rsubstantially symmetrical valve-body longitudinally movableV in` said casing and having an actuating rod membeil at either end thereof; a compression` spring acting betweensa'id cap andthe adjacentV actuating" rod oi` said valvebody; and means acting` on the other actuating rod 'of sa'idvalve-body to control theiiosition of said valve-body in said valve -mounting structure. Y

7; A. balanced pistonvalvebodyvfor controlling the fluid inlet ofturbines comprising a vpair of enlarged counter-part piston heads connected together by a reduced middle portion, and counter-part conical-ended actuating rod members projecting from the tivo heads, vvherebyeach of said rod membersV are adapted for 1`co'action With` valve localiaing memberssaid valveY thus being for end infl symmetrical and reversible end respect of all its functions. Y

8. In a controlling valve', the combination of a casingwitha valve mounting structure therein, comprising a removable cap; a valve-body longitudinally movable .in said structure a coiled compression spring acting between said cap as an abutment andl said valve-body to urge the latter longitudinally insaid stri" ture; and a movable abutment member interposed between' saidrspring and saidl valvebody; said springy being secured in said'cap and said member securedto said spring. i y Y 9. Aunitary controlling valve sub-assembly, coin-arising van abutment cap removable from the valve casing; a coiled ycompression spring with on'eoend secured in said cap and a movable vabutment member secured tov the other end of said compression spring.y 10. A unitary controlling valve subassembly, comprisingwa hollow abutment cap removableV from the valve casingand having an'undercut internal groove; a AcoiledV compression spring in said cap having a convolution engaged in said groove, soas to securev the spring in the cap'; `and a movable abut- Qinent member7 with an overhan'ging portion surrounding and engaging anyend convolution of the spring, vso as to secure themem` ber to the spring. f n

- kln testimony whereof, I have hereunto signed my name at Philadelphia, Pennsyl-l Vania,k this eleventh day of June, i919. 'Y Lewis Anile-Line@ Witnesses :l 'i i i f JAMES BELL, Y

E. L."lfunnifiirron'.r 

